光学学报, 2016, 36 (2): 0222001, 网络出版: 2016-01-25  

折反式大口径星敏感器光学设计及杂散光分析 下载: 531次

Optical Design and Stray Light Analysis for Large Aperture Catadioptricstar Sensor
作者单位
中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033
摘要
大口径星敏感器已成为卫星导航领域的迫切需求,根据大口径和轻量化的研究目标,采用R-C系统和球面补偿透镜组相结合的结构型式,设计了一个视场1.8°、焦距719 mm,入瞳直径164 mm,工作波段0.45~0.9 μm的折反式大口径星敏感器光学系统,采用像方远心设计,降低了像面离焦对能量质心位置计算的影响,同时提高了像面照度均匀性。根据像差理论计算初始结构参数,利用光学设计软件CODE V 进行了光线追迹和优化设计,设计结果表明,光学系统遮拦比0.317,光学传递函数在特征频率26 lp/mm 处,大于0.81,成像点80%的能量集中在3 × 3像元内,垂轴色差小于2 μm,最大质心偏差小于2 μm。采用内遮光罩、外遮光罩、次镜遮光罩和挡光环等消杂光设计来降低杂散光水平,利用Tracepro软件对光机系统的杂散光进行了仿真分析,分析结果表明,在离轴角6°~90°范围内,点源透射比在10-7~10-4量级,满足应用要求。
Abstract
Satellite navigation urgently requires large aperture star sensor. Based on the research objective of large aperture and light weight, alarge aperture catadioptric optical system is designed using an R- C system and a spherical compensating lens.The field of view of the star sensor is 18°, the focal length is 719 mm,the diameter of the entrance pupil is 164 mm, and the working waveband is from 0.45 μm to 0.9 μm. The telecentric image plane design decreases the effect of calculating the position of centroid caused by the imaging plane defocussing and increases the irradiance uniformity. The initial parameters are calculated based on aberration theory. Then, ray tracing and optimization are performed by CODE V software.The abscured ratio is 0.317.The MTF is more than 0.81@ 26 lp/mm, which approaches the diffraction limit, 80% energy encircled is within 3×3 pixels,the lateral chromatic aberration is less than 2 μm, and the centroidal deviation is less than 2 μm.The internal baffle, external baffle, second-mirror baffle, and blocking rings are used to decrease the stray light level. The stray light of the opticalmechanical is simulated and analyzed using TracePro software,and the results show that the point source transmittance is between 10-7 to 10-4 in the range of the incident angle 6°~90° incident angle, which satisfies the requirements of application.

薛庆生. 折反式大口径星敏感器光学设计及杂散光分析[J]. 光学学报, 2016, 36(2): 0222001. Xue Qingsheng. Optical Design and Stray Light Analysis for Large Aperture Catadioptricstar Sensor[J]. Acta Optica Sinica, 2016, 36(2): 0222001.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!